1 files changed, 43 insertions, 0 deletions
diff --git a/src/mainboard/intel/elkhartlake_crb/board_id.c b/src/mainboard/intel/elkhartlake_crb/board_id.c
new file mode 100644
index 0000000000..90609ff079
--- /dev/null
+++ b/src/mainboard/intel/elkhartlake_crb/board_id.c
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <boardid.h>
+#include <ec/acpi/ec.h>
+#include <ec/google/chromeec/ec.h>
+#include <stdint.h>
+
+#include "board_id.h"
+
+static uint32_t get_board_id_via_ext_ec(void)
+{
+	uint32_t id = BOARD_ID_INIT;
+
+	if (google_chromeec_get_board_version(&id))
+		id = BOARD_ID_UNKNOWN;
+
+	return id;
+}
+
+/*
+ * Get Board ID via EC I/O port write/read
+ * Board id is 5 bit, so mask other bits while returning board id.
+ */
+int get_board_id(void)
+{
+	MAYBE_STATIC_NONZERO int id = -1;
+
+	if (id < 0) {
+		if (CONFIG(EC_GOOGLE_CHROMEEC)) {
+			id = get_board_id_via_ext_ec();
+		} else {
+			uint8_t buffer[2];
+			uint8_t index;
+			if (send_ec_command(EC_FAB_ID_CMD) == 0) {
+				for (index = 0; index < sizeof(buffer); index++)
+					buffer[index] = recv_ec_data();
+				id = (buffer[0] << 8) | buffer[1];
+			}
+		}
+	}
+
+	return (id & 0x1f);
+}